http://jruby.sourceforge.net/

Jruby is a project to provide a Java implementation of the Ruby language and 
interpreter.

Jruby 0.8.0 has been released.  This version boasts:
 
- Full support for Ruby 1.8.x grammar (previously was a mix of 1.6 and 1.8)
- Runs RubyForge rubicon test suite (though not all tests pass)
- Almost countless core class/module fixes
- Improved java integration support
- Threading greatly improved

Thanks to all people on the project and mailing lists for making jruby a much 
better piece of software.

Here are the results against the TIP of rubicon:

========================================================================
All Tests                     Test Results                        V0.3.5
========================================================================
                 Name   OK?   Tests  Asserts      Failures   Errors
            ------------------------------------------------------------
    Rubicon::TestCase             1        5             
        AccessControl             3       18             
                Array   FAIL     69      613          2  
               Arrays             1        0             
           Assignment             4       75             
     BasicExpressions             3       15             
               Bignum            29     1598             
              Binding             1        0             
          BlocksProcs             3       61             
   BooleanExpressions             1        2             
           CatchThrow             1        1             
                Class             5       16             
              Classes             1        5             
           Comparable             7       26             
            Constants             3       20             
         Continuation   FAIL      5        0                   5
                  Dir   FAIL     21       91                   2
           Enumerable   FAIL     23      154          3  
                 Eval   FAIL      9       25          2        4
            Exception             6       16             
           Exceptions             6        6             
           FalseClass             6       17             
                 File   FAIL     33      236          4       22
             FileTest   FAIL      4       16                   4
           File__Stat   FAIL     32      128                  32
               Fixnum            35      414             
                 Flip   FAIL      7       26          1  
                Float            28      178             
               Floats             4       39             
                   GC             4        1             
                 Hash            44      296             
               Hashes             1        5             
                   IO   FAIL     53     1189          1       14
             IfUnless             1        2             
              Integer             9      347             
             Integers             1        5             
           Invocation   FAIL      6       10          4  
           KanjiIndex   FAIL     20       63         14  
               Kernel   FAIL    109     4863         12       17
            LoopStuff            16       71             
              Marshal             6       31             
            MatchData            11       18             
                 Math             2       62             
               Method             4       11             
              Methods             3       11             
               Module            25      101             
        ModulePrivate            15       41             
              Modules             1        5             
                Names             1        5             
             NilClass             8       21             
              Numeric            10       21             
               Object             2       11             
          ObjectSpace   FAIL      4        3                   2
  PredefinedVariables             2        8             
                 Proc             4        5             
                Range   FAIL     14      128          2        1
               Ranges             1        5             
               Regexp            14       38             
   RegularExpressions   FAIL      4       31                   1
                Scope   FAIL     13       24          2  
         SourceLayout             8       28             
               String   FAIL     87     1191          5        2
              Strings             6       32             
               Struct            11       47             
          Struct__Tms   FAIL      1        0                   1
               Symbol             8       20             
              Symbols             1        5             
               Thread   FAIL     32       74          5        6
          ThreadGroup             4        7             
                 Time   FAIL     41     1796                   2
            TrueClass             6       17             
========================================================================
         All 71 files   FAIL    964    14450         57      115
========================================================================


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+ http://www.tc.umn.edu/~enebo +---- mailto:enebo / acm.org ----+
| Thomas E Enebo, Protagonist  | "A word is worth a thousand  |
|                              |  pictures" -Bruce Tognazzini |